Patent GB-475538-A (GB)
Title: Stiffeners, adhesives and process for stiffening textile articles
IPC: D06M17/02
Filed: 1936-10-15
Abstract: 475,538. Paper-like adhesive stiffeners for textile articles. BOEHRINGER & SOEHNE, C. F. Oct. 15, 1936, No. 28047. Convention date, March 17. [Classes 96 and 140] [Also in Group VII] Paper-like felted layers for use as adhesive stiffeners for textile articles, e.g. shirt collars, uniform collars, or caps, are composed of inert or indifferent substances and of substances which are stable to water and which become adhesive under the influence of organic solvents or swelling agents, at least one of the two components consisting of fibres felted together, and the proportion of the indifferent fibres being such that the formation of a coherent film impermeable to air and moisture is avoided during the union of the felted products with the articles to be stiffened by use of solvents or swelling agents for the adhesive substance. Suitable indifferent fibres are cellulose-pulp, cotton, linen, hemp, cheap coarse muslin or they may be adhesive fibres partly protected by a coating of a substance, unaffected by the solvents or swelling agents employed and applied by spraying or by means of rollers, in more or less regular or irregular grating-like arrangement. These substances particularly if removed after sticking in of the stiffener, keep the places covered by them porous. Suitable adhesive substances are cellulose acetates, particularly tri-acetate, mixed cellulose esters, cellulose ethers, resins, particularly artificial resins. These substances may be fibrous, granular or in powder form. Suitable protective substances to be applied to adhesive fibres to render them inert are water-soluble starches, gum arabic or cellulose tri-benzoate. Some or all of the indifferent fibres may be in the form of a wide-meshed, light, easily absorbent texture which may be pressed into the water containing felt immediately after its formation or may be stuck in or on the felted products with the use of adhesive. The fabric is suitably incorporated in the felted product on a paper-making machine, the sieve base of which may be set in vibration so that the fibres are felted into the fabric. The adhesive product is placed between the layers of cloth to be united and stiffened, fastened therein by superficial stitching, pinning or sticking, painted or sprinkled with a solvent or swelling agent for the adhesive substance, and the whole is united with the use of pressure and if necessary of heat. Or the adhesive substance may be dipped into a suitable solvent and then placed between the layers of cloth and stuck to them. In some cases, one side only of the stiffeners may be united with another layer of material. In an example, 100 kgs. fibrous acetyl cellulose and 150 kgs. cellulose pulp are ground by themselves in a paper hollander mixed and worked up to a thin paper-like fleece. Suitable solvents for use with this are acetone for a cellulose diacetate or a methylene chloride-alcohol mixture for cellulose tri-acetate. In another example, a paper is made with fibrous cellulose diacetate and cellulose pulp, and a discontinuous layer of cellulose tri-benzoate is applied from a solution in toluene by means of a grooved roller. Acetone which hardly swells cellulose tri-benzoate is used as solvent. The cellulose tri-benzoate may be removed after sticking by means of toluene. In other examples, mixed artificial silk waste, consisting of cellulose acetate and viscose, or cellulose acetate artificial silk waste and cellulose pulp may be used to form the felted product with which a fabric may be incorporated. Specification 419,208 is referred to.